CKEDITOR.editorConfig = function( config ) {
    // The location of an external file browser, that should be launched when "Browse Server" button is pressed.
    config.filebrowserBrowseUrl = "/ckeditor/attachment_files";

    // The location of an external file browser, that should be launched when "Browse Server" button is pressed in the Flash dialog.
    config.filebrowserFlashBrowseUrl = "/ckeditor/attachment_files";

    // The location of a script that handles file uploads in the Flash dialog.
    config.filebrowserFlashUploadUrl = "/ckeditor/attachment_files";

    // The location of an external file browser, that should be launched when "Browse Server" button is pressed in the Link tab of Image dialog.
    config.filebrowserImageBrowseLinkUrl = "/ckeditor/pictures";

    // The location of an external file browser, that should be launched when "Browse Server" button is pressed in the Image dialog.
    config.filebrowserImageBrowseUrl = "/ckeditor/pictures";

    // The location of a script that handles file uploads in the Image dialog.
    config.filebrowserImageUploadUrl = "/ckeditor/pictures";

    // The location of a script that handles file uploads.
    config.filebrowserUploadUrl = "/ckeditor/attachment_files";

    // Rails CSRF token
    config.filebrowserParams = function(){
        var csrf_token, csrf_param, meta,
            metas = document.getElementsByTagName('meta'),
            params = new Object();

        for ( var i = 0 ; i < metas.length ; i++ ){
            meta = metas[i];

            switch(meta.name) {
                case "csrf-token":
                    csrf_token = meta.content;
                    break;
                case "csrf-param":
                    csrf_param = meta.content;
                    break;
                default:
                    continue;
            }
        }

        if (csrf_param !== undefined && csrf_token !== undefined) {
            params[csrf_param] = csrf_token;
        }

        return params;
    };

    config.addQueryString = function( url, params ){
        var queryString = [];

        if ( !params ) {
            return url;
        } else {
            for ( var i in params )
                queryString.push( i + "=" + encodeURIComponent( params[ i ] ) );
        }

        return url + ( ( url.indexOf( "?" ) != -1 ) ? "&" : "?" ) + queryString.join( "&" );
    };

    // Integrate Rails CSRF token into file upload dialogs (link, image, attachment and flash)
    CKEDITOR.on( 'dialogDefinition', function( ev ){
        // Take the dialog name and its definition from the event data.
        var dialogName = ev.data.name;
        var dialogDefinition = ev.data.definition;
        var content, upload;

        if (CKEDITOR.tools.indexOf(['link', 'image', 'attachment', 'flash'], dialogName) > -1) {
            content = (dialogDefinition.getContents('Upload') || dialogDefinition.getContents('upload'));
            upload = (content == null ? null : content.get('upload'));

            if (upload && upload.filebrowser && upload.filebrowser['params'] === undefined) {
                upload.filebrowser['params'] = config.filebrowserParams();
                upload.action = config.addQueryString(upload.action, upload.filebrowser['params']);
            }
        }
    });

    config.htmlEncodeOutput = false;
    config.entities = false;
    config.enterMode = CKEDITOR.ENTER_BR;
    config.toolbarGroups = [
        { name: 'clipboard',   groups: [ 'clipboard', 'undo' ] },
        { name: 'editing',     groups: [ 'find', 'selection', 'spellchecker' ] },
        { name: 'links' },
        { name: 'insert' },
        // { name: 'forms' },
        { name: 'tools' },
        { name: 'document',	   groups: [ 'mode', 'document', 'doctools' ] },
        { name: 'others' },
        // '/',
        { name: 'basicstyles', groups: [ 'basicstyles', 'cleanup' ] },
        { name: 'paragraph',   groups: [ 'list', 'indent', 'blocks', 'align', 'bidi' ] },
        { name: 'styles' },
        { name: 'colors' },
        { name: 'about' }
    ];
    //config.toolbar = [
    //    [ 'Source', '-', 'Bold', 'Italic' ]
    //];
    config.extraPlugins = 'autolink,uploadwidget,uploadimage';
    config.uploadUrl = '/ckeditor/attachment_files/upload_paste_file'
};